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(No Model.) 3 sheets-sheet 1".

M. SOHWARZLER. FEED ATTACHMENT EOE DRILLING MACHINES.

No. 395,592. Patented Jan. 1,1889.

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, M. SOHWARZLER.

FEED ATTACHMENT FOR DRILLING MACHINES. No. 395,592. Patented Jan. 1,1889 N. PETERS, Phcla-Ldhographcr. Washinglnn, ll 6.

3 SheetYs Sheet 3.

(No Model.)

M. SGHWARZLER.

FEED ATTACHMENT FOR DRILLING MACHINES.

No. 395,592. Patented Jan. 1,1889.

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MARTIN SCHlVARZLER, OF NEW YORK, N. Y.

FEED ATTACHMENT FOR DRILLING ll/IACHINES.

SPECIFICATION forming part of Letters Patent No. 395,592, dated January1, 1889.

Application filed July 3, 1888.

To aZZ whom it may concern.-

Be it known that I, MARTIN SoHwiiRzLER, of the city, county, and Stateof New York, hav e invented certain new and useful Improvements in FeedAttacluncnts for Drilling-llachines; and I do hereby declare that th 0following is a full and exact description thereof, ref erence being hadto the accompanying drawings, and to the letters of reference markedthereon, making a part of this specification, in which Figure 1 is afront elevation of my improved It consists in the combination ofdevices,

as hereinafter fully described, and set forth in the claims, whereby theclutch by which the ratchet-wheel and the shaft in the drill-feedingmechanism are coupled together is automatically moved and released atthe moment the feed has progressed far enough, so that the feed isthereby arrested and the drill left free to be carried upward by meansof its retracting spring or weight, and also whereby simultanemisly withthe automatic retraction of the drill a catch controlling the movementof the carriage upon which the work is mounted is momentarily releasedfrom one of a series of notches in a gage-bar on the carriage, therebyallowin the carriage to move automatically forward under the influenceof a weight or spring until arrested by the engagement of the catch withthe next notch, all as hereinafter specified.

In the accompanying drawings, 1. 1 are the pillars or standards of themachine, to which are fitted the lateral brackets 2 2*. In the upperends of the two brackets are journaled the two parallel shafts and 1:(see Fig. 2) for the feed mechanism of the drill, and the brackets areconnected by a top plate, 5, and.

Serial No. 278,944. (No model.)

by two parallel bars, 6 and 7, beneath it,which furnish suitablebearings for the vertical drillspindle 8.

The feed mechanism for the drill is con structed substantially asdescribedin my patent,No. 343,73at, of June 15, 1886. It consists of alarge ratchet-wheel, 9, mounted loosely upon the shaft Thisratchet-wheel is connected. and disconnected from said shaft by means ofa clutch, 10. (See Fig. 1.) This clutch 10 consists of a disk formedwith a radial arm, 12, from which projects a lateral pin, 13, which isadapted to engage any of an annular series of holes in the side of theratchet-wheel, while a second parallel. pin, 11, projecting from thedisk, is adapted to engage simultaneously any of an annular series ofholes in the outer flange, 16, of the shaft 3. Thus by moving the clutchinwardly its two pins, 11 and 13, engage the shaft and ratchetwheel andconnect them; but by moving it outwardly they are disconnected and theratchet-wheel moves freely.

The ratchet-wheel 9 is made to revolve with an intermittent movement bymeans of a pawl, 18, pivoted to the upper end of a vibrating lever, 19,(see Fig. 2,) whose lower end terminates in a bent arm, 20, which isbrought into contact with an eccentric, 52], upon the driving-shaft 22of the machine.

The drill-spindle 8 is journaled to rotate freely in the two transversebars 6 and 7, and is driven by means of a belt, 50, car *ied over apulley, 23, feathered on said spindle, as shown in Fig. 2, and extendingthence to the driving-pulley on the main shaft. The drill spindle iscoupled at its upper end by a suitable coupling device, MC, of thecustomary form, which will permit a free rotation of the spindle to averti call y-reci procatin g rack-bar, 25, mounted in the top plate, 5,A pinion, 26, upon the shaft +t meshes with the rack-bar, and a largespur-wheel, 2'', (see Fig. 1,) upo said. shaft 4, meshing with a smallpinion, 28, upon the shaft 3, gears them together, so that the rotationof the shaft 3 servesto vertically reciprocate the drill-spindle.

The rack-bar 25 and attached drill-spindle 8 are automatically carriedup to their highest position when the shaft 3 is free and disengagedfrom the ratchet-wheel 9 bymeans of a weight, 29, suspended from a cord,30, (see Fig. 2,) carried over suitable pulleys, 31 31, and attached toa parallel vertically-reciprocating rack-bar, 32, mounted in a bracket,33, (projecting from the top plate, 5,) and which meshes with a pinion,34, upon the shaft 3. The movements of this parallel rack-bar 32 arenecessarily synchronous with the movements of the rack-bar 25, carryingthe drillspindle, but owing to the difference in gear are more rapid.

To obtain an automatic control of. the movements of the clutch 10, theclutch is engaged by a fork at the upper end of the vertical arm of abell-crank lever, 35, pivoted to an ottset, 36, projecting from theframe of the machine beneath the clutch, (see Fig. 1,) so that theshorter horizontal arm, 37, of the lever projects toward a verticaltripping-rod, 3S, titted in the lower end of the rack-bar 32. Theshorter end of a horizontal lever, 39, jointed to the front edge of thebracket 2, is pivoted to the end of said arm 37, while its longer endprojects into proximity to the tripping-rod 38 in position to be struckby either of two adj ustable fingers, 4:0 and 41, projecting fromcollars fitted upon the rod 38, and secured thereon when properlyadjusted by means of setscrews 42 4:2. A flat spring, 60, operates tothrow the clutch automatically into engagement with the ratchet-wheeland the flange on the shaft to couple them.

A spiral spring, i3, secured at one end to the rod 38 and at the otherto the bracket 33 on the frame of the machine, (see Fig. 1,) serves toquicken the upward start of the tripping-rod when it is set free, andalso operates to re-enforce the action of the spring (50 in producing anengagement of the clutch. A spring-actuated catch, 4st, engaging a pinon the side of the long end of the lever 2:9, serves to hold the leverand keep the clutch back after the lever has been depressed by the upperfinger, 4:0, and until it is moved back by the lower finger, ll.

The tube or other piece of work to be drilled is mounted upon a suitablecarriage, 4.6, sliding horizontally in ways formed upon the bed-plate 47of the machine immediately under the drill-bar. This carriage isadjusted laterallyin its ways by means of set-screws 4:8 48. It isautomatically carried in one direction by means of a weight, 49,attached by a cord to one end thereof, and is arrested in its automaticmovement by means of a lateral catch-bar, 51, Figs. 2 and 8, fitted toslide horizontally at a right angle to the line of movement of thecarriage into and out of engagement with a series of notches formed inthe side of a detachable gage-bar, 45, secured on the proximate top sideedge of the carriage. The front end of the catch 51 is beveled from bothsides to a sharp angle, (see Fig. 3,) and the engagement of this anglewith the several notches in the gage-bar 45 is enforced by means of aspring, 52, inserted back of the catch, as shown in Fig. 3.

The gage-bar45 is preferably rectangular in cross-section, and isadapted for ready detachment from the carriage and admits of reversal,so that any one of its four sides may be presented to the catch, eachside having a dilierent system of notches formed thereon, (see Fl 3,)severally distinguished by the different intervals between the notches.

The catch 51 is automatically withdrawn from its notch in the gage-barat the moment the drill is withdrawn from. the work, and instantlyreleased to engage the next notch by means of a lever, 53, pivoted tovibrate horizontally in the plane of the catch-bar. (See Fig. 3.) Thislever 53 jointed at one end by a pivotal connection to the catch-bar,and its opposite end is brought into contact with a latch, 54-, (seeFig. 2,) upon the lower shorter arm, adjustable in length, of a lever,55, which is pivoted to vibrate in avertical plane in line with thevertically-reciprocating tripping-rod 38, and whose upper longer arm isbent to curve forward into ahorizontal plane, as shown in Fig. 2, so asto overlap a finger, 56, ad justably titted by means of a collar andset-screw to the lower end of said rod 38. A friction-roller, 5.), isfitted upon the end of this longer arm of the lever 55, so as to easethe frictional contact of the finger 5G with the lever and allow thelatter to move freely over the former.

The latch 54- is so adjusted as that when the lower arm of the verticallever is swung backward the latch will swing up and slide back freelyover the end of the horizontal lever 53, and then drop into positionbehind it to engage it; but when the arm swings forward the latch ongages said lever, and thereby causcs it to move so as to produce aretraction of the catch-bar from the carriage, and in doin so to slipover and pass free from the lever.

A guide and support are provided for the drill to be used in starting itupon a curved surface, such as the periphery of a tube. It consists of aD0i'fOlflt0tl head, 57, (see positive and dotted lines, Fig. 2,) adaptedto the size of the drill and titted upon. the end of an arm, 58, pivotedto the frame to swing from an upright into a suitable horizontalposition upon the piece of work immediately under the drill, so that thedrill may pass through it. (See dotted lines, Fig. 2.) \Vhen not in use,it is swung up out of the way, as shown in positive lines in Fig. 2.

In the use of my invention, the work being properly secured upon thecarriage under the drill, the carriage 40 is moved back so as to bringthe drill in position for the first hole of the series, and in so movingit back the weight 49 is lifted. \Vhen thusmoved back, the carriage isheld in opposition to the in fiuence of the weight i9 by the engagementof the springactuated lateral catch 51 with the first of the series oflateral notches in the gage-bar 45, secured to the carriage. The drill,being new actuated in the customary manner by means reciprocating rodmounted parallel with the drill-spindle to move/in synehronism with it,the gearing between the rod and spindle, an adjustable finger projectingfrom the rod, and means for disengaging the catch from the carriage bythe movement of the finger, consistin of the interposed 1,ivote(llevcrs53 and 55, all substantially in the manner and for thepurpose herein set forth.

0. The combinatimi, in a (lrillinp;-n1achine, of the carriage M thelateral swing-actuated catch 51, and The detachable, reversible,

notched gage-bar secured upon the carriage to be engaged by the catch,substantially in the manner and for the purpose herein set I 5 forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

MARTIN SGHXVARZLER.

'itnesses:

A. N, JESBERA, E. M. WATSON.

